N,N-DIMETHYL-4-NITROSOANILINE Property

Melting point:

85-87 °C(lit.)

Boiling point:

271.72°C (rough estimate)

Density 

1,15 g/cm³

refractive index 

1.6180 (estimate)

storage temp. 

Store below +30°C.

Water Solubility 

Insoluble in water

solubility 

soluble in Chloroform, Methanol

form 

powder to crystal

pka

-0.90±0.12(Predicted)

color 

Yellow to Brown to Dark green

Merck 

14,6638

BRN 

607293

Stability:

Stable. Incompatible with strong oxidizing agents, strong reducing agents, strong acids, acetic acid, acetic anhydride. Highly flammable

CAS DataBase Reference

138-89-6(CAS DataBase Reference)

EPA Substance Registry System

N,N-Dimethyl-p-nitrosoaniline (138-89-6)

Safety

Hazard Codes 

F,T

Risk Statements 

11-25-36/37/38-43

Safety Statements 

16-26-36/37-45

RIDADR 

UN 1369 4.2/PG 2

WGK Germany 

3

RTECS 

BX7175000

F 

4.7-8-9

TSCA 

Yes

HS Code 

2921 42 00

HazardClass 

4.2

PackingGroup 

II

Hazardous Substances Data

138-89-6(Hazardous Substances Data)

Toxicity

LD50 orally in Rabbit: 65 mg/kg

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H251Self-heating; may catch fire

H301Toxic if swalloed

H315Causes skin irritation

H317May cause an allergic skin reaction

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P235Keep cool.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

N,N-DIMETHYL-4-NITROSOANILINE Chemical Properties,Usage,Production

Chemical Properties

green crystalline powder

Uses

manufacture of organic Compounds; accelerator in vulcanizing; in printing fabrics.

Definition

ChEBI: The 4-nitroso derivative of N,N-dimethylaniline.

General Description

A dark green crystalline solid. Insoluble in water. Harmful if ingested.

Air & Water Reactions

Susceptible to spontaneous combustion upon exposure to air. Insoluble in water.

Reactivity Profile

N,N-DIMETHYL-4-NITROSOANILINE has a delayed violent reaction with acetic anhydride.

Health Hazard

Fire will produce irritating, corrosive and/or toxic gases. Inhalation of decomposition products may cause severe injury or death. Contact with substance may cause severe burns to skin and eyes. Runoff from fire control may cause pollution.

Fire Hazard

Flammable/combustible material. May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. Some react vigorously or explosively on contact with water. Some may decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished. Runoff may create fire or explosion hazard. Containers may explode when heated.

Safety Profile

Poison by ingestion. Mutation data reported. Questionable carcinogen with experimental tumorigenicdata. Flammable when exposed to heat, flame, or oxidzers. Violent reaction with acetic anhydride + acetic acid. When heated to decomposition it emits toxic fumes of NOx

Purification Methods

Recrystallise the nitroso-aniline from pet ether or CHCl3/CCl4 and dry it in air. Alternatively suspend it in H2O, heat to boiling and add HCl until it dissolves. Filter, cool and collect the hydrochloride [42344-05-8] with m 177o after recrystallisation from H2O containing a small amount of HCl. The hydrochloride (e.g. 30g) is made into a paste with H2O (100mL) in a separating funnel. Add cold aqueous 2.5 NaOH or Na2CO3 to a pH of ~ 8.0 (green color due to the free base) and extract with toluene, CHCl3 or Et2O. Dry the extract (K2CO3), filter, distil off the solvent, cool the residue and collect the crystalline free base. Recrystallise it as above and dry it in air. [Beilstein 12 IV 1558.]